What this card needs more from an enchantment is more stuff to do early game and more repeatable card draw, so it may be cliche but you could put Mystic Remora or Rhystic Study here and I'm sure they would prove useful to keeping the deck fueled
The first aims for an inexorable long game, carefully timing blink spells to safely reuse ETB effects, often countering single target removal or turning evenhanded board wipes into events where you come out far ahead of the rest of the table
A commander like Ian Malcolm, Chaotician can be the captain of this mess
If you're already planning to grab booster packs, video games, or anything else from the shop, taking credit gives you the best return on your collection
With Fauna Shaman in your deck, you can also take more of a toolbox approach to deck building, with one or two copies of specific cards to help in any situation